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From AJ ...@dude.podzone.net>
Subject Re: Multiple large disks in server - setup considerations
Date Wed, 08 Jun 2011 04:19:19 GMT
On 6/7/2011 9:32 PM, Edward Capriolo wrote:
<snip>
>
> I do not like large disk set-ups. I think they end up not being 
> economical. Most low latency use cases want high RAM to DISK ratio.  
> Two machines with 32GB RAM is usually less expensive then one machine 
> with 64GB ram.
>
> For a machine with 1TB drives (or multiple 1TB drives) it is going to 
> be difficult to get enough RAM to help with random read patterns.
>
> Also cluster operations like joining, decommissioning, or repair can 
> take a *VERY* long time maybe a day. More smaller servers like blade 
> style or more agile.
>

Is there some rule-of-thumb as to how much RAM is needed per GB of 
data?  I know it probably "depends", but if you could try to explain the 
best you can that would be great!  I too am projecting "big data" 
requirements.

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